All about the Monstersche sluis: service times, location and contact details. On the water map below do you see this lock complex in its immediate vicinity. On the right on this page you will find the locking times, additional information and the telephone numbers and VHF channels.
Open the Water Map for Maassluis in full window
For seasoned water sports enthusiasts it is a simple procedure, but if you are not yet experienced on the water, entering and exiting the lock can be an impressive experience. How does it work, where do you moor, what should you pay attention to?
| Width 3.4 meter | Lock length 22.5 meter |
| Threshold depth (buiten) - meter | Threshold depth (binnen) - meter |
| VHF-Channel - | Phone number 06-26112500 |
From 15-04 until 23-05
Outside these days/times the lock can be operated on requestOn 24-05
Outside these days/times the lock can be operated on requestFrom 25-05 until 14-10
Outside these days/times the lock can be operated on requestFrom 15-10 until 14-04
All days: closedAdministrator visiting address
Koningshoek 93050 Maassluis
Phone number: 14010
Data updated: 09 Februari 2026, 14:54 uur
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